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Financial Assets, Non-current - Summary of Financial Assets, Non-current (Detail) - SEK (kr) kr in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of financial assets [line items] |  |
Opening balance | kr 2,091 |
Opening balance | 9,931 |
Translation differences | (2) | kr (124)
Closing balance | 2,029 | 2,091
Closing balance | 19,440 | 9,931
Other investment in shares and participations [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 2,091 | 2,074
Additions | 207 | 206
Disposals/repayments/deductions | (64) | (2)
Amortization | 0 | 0
Change in value in funded pension plans | 0 | 0
Revaluation | (202) | (185)
Reclassification | 0 | 0
Translation differences | (3) | (2)
Closing balance | 2,029 | 2,091
Interest bearing securities, non-current [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 9,931 | 9,164
Additions | 15,950 | 12,887
Disposals/repayments/deductions | (224) | (4,127)
Amortization | 0 | 0
Change in value in funded pension plans | 0 | 0
Revaluation | 160 | 269
Reclassification | (6,377) | (8,262)
Translation differences | 0 | 0
Closing balance | 19,440 | 9,931
Other financial assets, non-current [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 6,350 | 6,839
Additions | 2,919 | 1,899
Disposals/repayments/deductions | (2,585) | (816)
Amortization | (136) | (457)
Change in value in funded pension plans | (960) | (1,033)
Revaluation | 21 | 0
Reclassification | (455) | (65)
Translation differences | 7 | (17)
Closing balance | kr 5,161 | kr 6,350

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